40 citations · 145 across the 13 of their papers we have counts for
13 papers
Gate tuning of fractional quantum Hall states in InAs two-dimensional electron gas
S. Komatsu, H. Irie, T. Akiho +3
We report the observation of fractional quantum Hall (FQH) effects in a two-dimensional electron gas (2DEG) confined to an InAs/AlGaSb quantum well, using a dual-gated Hall-bar dev…
Andreev reflection and bound state formation in a ballistic two-dimensional electron gas probed by a quantum point contact
Hiroshi Irie, Clemens Todt, Norio Kumada +4
We study coherent transport and bound-state formation of Bogoliubov quasiparticles in a high-mobility InGaAs two-dimensional electron gas (2DEG) coupled to a sup…
Josephson coupling through one-dimensional ballistic channel in semiconductor-superconductor hybrid quantum point contacts
Hiroshi Irie, Yuichi Harada, Hiroki Sugiyama +1
We study a superconducting quantum point contact made of a narrow InGaAs channel with Nb proximity electrodes. The narrow channel is formed in a gate-fitted con…
Transmission-phase measurement of the 0.7 anomaly in a quantum point contact
Toshiyuki Kobayashi, Shoei Tsuruta, Satoshi Sasaki +2
We measure the transmission phase of a quantum point contact (QPC) at a low carrier density in which electron interaction is expected to play an important role and anomalous behavi…
Carrier flow and nonequilibrium superconductivity in superconductor-based light-emitting diode
Ryotaro Inoue, Hideaki Takayanagi, Tatsushi Akazaki +3
Superconductor-based light-emitting diode (superconductor-based LED) in strong light-confinement regime are characterized as a superconductor-based three-terminal device, and its t…
Transport properties of Andreev polarons in superconductor-semiconductor-superconductor junction with superlattice structure
Ryotaro Inoue, Kenta Muranaga, Hideaki Takayanagi +4
Transport properties of a superconductor-semiconductor-superconductor (S-Sm-S) junction with superlattice structure are investigated. Differential resistance as a function of volta…